Understanding the difference between download and upload speeds may just provide the clue
You need both download and upload speeds to run Zoom. Your download speeds affect what you can see, and upload speeds affect how other people on the call can see you. The higher your upload speeds, the smoother you’ll broadcast yourself to other people on the call. The higher the download speeds, the more clear you’ll be able to see and hear everyone else on the call.
Since most internet services are asynchronous unequal streaming in both directions may lead to some of those funny outcomes.
Can you mention some of your observation in the comments section below
Zoom data usage for a 1:1 meetingQualityDownloadUploadTotalHigh270 MB/hr.270 MB/hr.540 MB/hr.720p540 MB/hr.540 MB/hr.1.08 GB/hr.1080p810 MB/hr.810 MB/hr.1.62 GB/hr.
You use somewhere between 540 MB and 1.62 GB per hour (between 9 MB and 27 MB per minute) for a 1:1 Zoom meeting, depending upon the streaming quality.
Zoom data usage for a group callQualityDownloadUploadTotalHigh450 MB/hr.360 MB/hr.810 MB/hr.720p675 MB/hr.675 MB/hr.1.35 GB/hr.1080p1.2 GB/hr.1.2 GB/hr.2.4 GB/hr.
Your Zoom data usage jumps up with more people on the call. Group Zoom meetings take up somewhere between 810 MB and 2.4 GB per hour, or between 13.5 MB and 40 MB per minute.
1:1 Zoom Meeting 540MB to 1.6GB per hour
Group Zoom meeting. 810MB to 2.4GB per hour